package com.partsoft.utils;

import java.util.Collection;
import java.util.Map;

@SuppressWarnings({"rawtypes", "unchecked"})
public abstract class Assert {

	public static void isTrue(boolean expression, String message) {
		if (!(expression))
			throw new IllegalArgumentException(message);
	}

	public static void isTrue(boolean expression) {
		isTrue(expression, "[Assertion failed] - this expression must be true");
	}

	public static void isNull(Object object, String message) {
		if (object != null)
			throw new IllegalArgumentException(message);
	}

	public static void isNull(Object object) {
		isNull(object, "[Assertion failed] - the object argument must be null");
	}

	public static void notNull(Object object, String message) {
		if (object == null)
			throw new IllegalArgumentException(message);
	}

	public static void notNull(Object object) {
		notNull(object, "[Assertion failed] - this argument is required; it must not be null");
	}

	public static void hasLength(String text, String message) {
		if (!((text != null) && (text.length() > 0)))
			throw new IllegalArgumentException(message);
	}

	public static void hasLength(String text) {
		hasLength(text, "[Assertion failed] - this String argument must have length; it must not be null or empty");
	}

	public static void hasText(String text, String message) {
		if (!((text != null) && (text.length() > 0)))
			throw new IllegalArgumentException(message);
	}

	public static void hasText(String text) {
		hasText(text, "[Assertion failed] - this String argument must have text; it must not be null, empty, or blank");
	}

	public static void doesNotContain(String textToSearch, String substring, String message) {
		if ((!((textToSearch != null) && (textToSearch.length() > 0)))
				|| (!((substring != null) && (substring.length() > 0))) || (textToSearch.indexOf(substring) == -1))
			return;
		throw new IllegalArgumentException(message);
	}

	public static void doesNotContain(String textToSearch, String substring) {
		doesNotContain(textToSearch, substring,
				"[Assertion failed] - this String argument must not contain the substring [" + substring + "]");
	}

	public static void notEmpty(Object[] array, String message) {
		if (array == null || array.length == 0)
			throw new IllegalArgumentException(message);
	}

	public static void notEmpty(Object[] array) {
		notEmpty(array, "[Assertion failed] - this array must not be empty: it must contain at least 1 element");
	}

	public static void noNullElements(Object[] array, String message) {
		if (array != null)
			for (int i = 0; i < array.length; ++i)
				if (array[i] == null)
					throw new IllegalArgumentException(message);
	}

	public static void noNullElements(Object[] array) {
		noNullElements(array, "[Assertion failed] - this array must not contain any null elements");
	}

	public static void notEmpty(Collection collection, String message) {
		if ((collection == null) || (collection.isEmpty()))
			throw new IllegalArgumentException(message);
	}

	public static void notEmpty(Collection collection) {
		notEmpty(collection,
				"[Assertion failed] - this collection must not be empty: it must contain at least 1 element");
	}

	public static void notEmpty(Map collection, String message) {
		if ((collection == null) || (collection.isEmpty()))
			throw new IllegalArgumentException(message);
	}

	public static void notEmpty(Map map) {
		notEmpty(map, "[Assertion failed] - this map must not be empty; it must contain at least one entry");
	}

	public static void isInstanceOf(Class clazz, Object obj) {
		isInstanceOf(clazz, obj, "");
	}

	public static void isInstanceOf(Class type, Object obj, String message) {
		notNull(type, "Type to check against must not be null");
		if (!(type.isInstance(obj)))
			throw new IllegalArgumentException(message + "Object of class ["
					+ ((obj != null) ? obj.getClass().getName() : "null") + "] must be an instance of " + type);
	}

	public static void isAssignable(Class superType, Class subType) {
		isAssignable(superType, subType, "");
	}

	public static void isAssignable(Class superType, Class subType, String message) {
		notNull(superType, "Type to check against must not be null");
		if ((subType == null) || (!(superType.isAssignableFrom(subType))))
			throw new IllegalArgumentException(message + subType + " is not assignable to " + superType);
	}

	public static void state(boolean expression, String message) {
		if (!(expression))
			throw new IllegalStateException(message);
	}

	public static void state(boolean expression) {
		state(expression, "[Assertion failed] - this state invariant must be true");
	}
}
